Connecting-rod eor reciprocating engines



F. H. RQYCE. CONNECTING ROD FOR RECIPROCATING ENGINES.

APPLICATION F|LED'1AN.6. 19|9.

1,322,824, Patented Nov. 25,1919.

[Mentor Freoerickenr n,elif-'ng ses "PrnT @Emme frnnnnnicii HENRY neven, or osiviAsTon, ENGLAND, Assisnon fro Roms ROYCE;

- 1 ,LIMITED,. or osMAsroN, ENGLAND'.- f f L eonnecrinenonron aneiinoenrine Enemies f incassi.

Tofctvll 'whom t 'may convertiti Y- 'Be itknown that-I, FREDERICK 'HENRY Reifen, a subject ofthe Kingof Great Britain and Ireland, of Osmaston, in 'the-county of Derby,` England, have invented certain s newy and useful Improvements c in Connecting-Rods for Reciprocating -Engines7 of which the following lisA a specification. V

This invention relatesto' the mounting of connecting' rods of reciprocating engines, especially those having two or more cylinders arranged in pairs 'with the axes of each pair lying in a plane at right angles to the axis of the crank-shaft.

ln arrangements heretofore in vogue there have been used either two similar connecting vrods eachV occupying half the length of the crank pin, or two dissimilar rods, the one linked or hingedto the otherV at a point some distance removed from the crank pin center, or again7 a forked and a singleended rod both connecting direct on the crankepin, the single-ended rod lying within the fork ofthe forked rod with usually a bush extending along and taking bearing on the crank-pin secured rigidly in the forks of the forked end and upon which the single end rod takes bearing.v

The'desideratum in such connecting rod is to assume that the thrust of each rod shall act directly on the crank-pin and to further l tioned' kind but with provision to prevent or resist the tendency for the fork to open and close, while at the saine time affording for each rod the maximum of'bearing length Vwith the minimum length of crank pin.

The invention is particularly useful in engines where the stresses on the rods are high. 'l

fTo these ends the connecting rodsare con- A structed, one with a forked end andthe other with. a single end, the latter adapted to be located. .within the forks of the forked end and a bush is provided taking its bearing on the crank-pin extended from end to Application niet January e, i919. serial No. Y2691520.r

specificati-ign of tetfersrateni. Q -Paeenteismng wiel end of saidcrank{pin,"and having, at the end parts which' receivethe forks,"annular` grooves orrecesses and inside the eyes of the forks are provided "corresponding annular projections to engage the said grooves or 'recesses. The center portion 'of the outside of the bushis `machined smoothand parallel to the cr`ank-pi1i.'- 5 y The bush is rigidly attached to thefoiks of' the forked vconnecting Vrod and takes bearing on the crank-pin while `between said forks it :affords a bearing vfor the singlei ended rod. Y

vAn embodiment vof the invention is illustrated Vin the accompanying Y drawings wherein l Figure l is a view in elevation of the ends of'one pair of connecting rods` attached to the bush7 Fig. 2 is a cross; section on line A- i of Figv'l, and Fig. 3 is an enlarged `section or part of Fig. 2 showing the grooved'portion of thebnsh and forked rod.

a designates a connecting rod provided with two forks, al and a2, and and 1 are caps secured to said forks a1 and e2 by the bolts a and 01 to complete the eyes of the fork-ended rod. l designates the bush formed in halves and lined with white metal as customary, shown at d1. 'Grooves alzare formed on the outside of said bush, which grooves are engaged by corresponding projections cl3 formed inside theeye of the forks al and a2. rlhe grooves and projections are Vso proportionedthat when the bolts c 01 are tightened up7 the projections of the eyes are pressed closely into the vgrooves in the bush. In order to insure the full tightening. effect of the bolts c c1, a sniall'space c2 is-left between the caps o b1, and that part of the eye which is integral with the rod.v

Dowel pins e rreprovided 'to insure that y the joint between the ,two halves of the bush d falls approximately in the same plane as that between the rod and cap of the forked rod and to insurethat the bush shall not rotate relatively lto the eyes of the fork-ended rod, saiddowel pins are driventightly into the part of the eye which is integral with theA rod and the caps and fit into holes provided for their reception in the bush.v

f designates theother connecting rodhaving a single veye'which encircles and takes its bearing upon-a smooth parallel portionl of the bush allocated between the grooved ends thereof.

incl

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Y A What I Claim; s my invention anddesire 'n .glo ended md5-the said buShfiheV-ngenlluler to Ysecure by Letters :Patent of the United iStates'isz,h

lLuIfn' connecting rods for-reciprocating engines,rthe combination of tWo rods, vone havingoa forked endv and Jche o'her a single end,V the end of the latter rod being disposedVA Y between the forks of the former, abush rigz'xvr idly attached to the ends` of the ifo-liked rod vand adapted E1:07 bear on a crank-pin or equivalent and afford arbearing 'forthe singroovesfor recessesyandCorresponding auf millar projections ori the 'endsl o1e ythe :forked rod engaging said; grooves or recesses; Y

in ,the bush one-"for oneY cylinder having a end and the cr thervforther second cylinder, having disposed Ybetvv'feen the forks of theirstnnen# ends vroffth'eforked"rodand adapted to bear la singleend, the end offthe latter'rod--being fvtioned rod, a bush Vrigidly` attached-to 'the' on the crank-pin orequivalent and afford a spending annlar projections on the nds of the forked rod engaging said grooves o forked, rodond Witnesses: 1 v Y hearing* 'or Jche single ended rod,fsaid bush' having`- .grooves `or lrecesses, corre;

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